首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1256篇
  免费   73篇
  国内免费   13篇
耳鼻咽喉   1篇
儿科学   57篇
妇产科学   2篇
基础医学   95篇
口腔科学   15篇
临床医学   169篇
内科学   301篇
皮肤病学   38篇
神经病学   61篇
特种医学   32篇
外科学   243篇
综合类   8篇
预防医学   23篇
眼科学   139篇
药学   53篇
肿瘤学   105篇
  2023年   10篇
  2022年   9篇
  2021年   25篇
  2020年   16篇
  2019年   18篇
  2018年   22篇
  2017年   26篇
  2016年   23篇
  2015年   27篇
  2014年   31篇
  2013年   32篇
  2012年   56篇
  2011年   67篇
  2010年   35篇
  2009年   41篇
  2008年   46篇
  2007年   62篇
  2006年   63篇
  2005年   57篇
  2004年   40篇
  2003年   42篇
  2002年   47篇
  2001年   48篇
  2000年   40篇
  1999年   63篇
  1998年   23篇
  1997年   12篇
  1996年   18篇
  1995年   18篇
  1994年   14篇
  1993年   14篇
  1992年   21篇
  1991年   28篇
  1990年   29篇
  1989年   34篇
  1988年   26篇
  1987年   19篇
  1986年   22篇
  1985年   12篇
  1984年   18篇
  1983年   9篇
  1981年   7篇
  1979年   10篇
  1978年   6篇
  1972年   5篇
  1971年   4篇
  1970年   5篇
  1969年   4篇
  1968年   5篇
  1959年   4篇
排序方式: 共有1342条查询结果,搜索用时 11 毫秒
51.

Objectives

The number of teeth has frequently been used as an indicator of oral health in investigations of food intake; however, this measure does not represent the efficacy of the masticatory performance. Masticatory performance may be more important for food selection and avoidance than number of remaining teeth. The aim of this study was to investigate the association of occlusal force with habitual dietary intakes in independently living older Japanese.

Methods

The study population was 757 community-dwelling people aged 69–71 years old. Bilateral maximal occlusal force in the intercuspal position was measured with pressure-sensitive sheets. Removable denture wearers kept their dentures in place during the measurements. Dietary habits during the preceding month were assessed using a brief-type self-administered diet history questionnaire that measures consumption frequencies of selected food commonly consumed and calculates energy-adjusted dietary intakes. Linear trends of food and nutrient intakes with decreasing occlusal force were tested after adjusting for gender and socioeconomic factors.

Results

After adjusting for socioeconomic status and the number of remaining teeth, decline of occlusal force was significantly associated with lower intakes of vegetables, vitamins A, C, B6, folate, and dietary fibre (P for trend < 0.05). In contrast, number of teeth was significantly associated only with calcium and zinc, controlling for occlusal force.

Conclusions

It is concluded that occlusal force was significantly associated with intakes of vitamins and dietary fibre rather than number of remaining teeth in independently living older Japanese.  相似文献   
52.
Cancer Chemotherapy and Pharmacology - Chemotherapy after hepatectomy for colorectal liver metastasis has not been established, due to the toxic side effects, which are likely related to impaired...  相似文献   
53.
Whether germline (g) breast cancer susceptibility gene (BRCA) mutations are located within or outside the ovarian cancer cluster region (OCCR) (1380‐4062 bp for gBRCA1, and between 3249‐5681 bp and 6645‐7471 bp for gBRCA2) may influence risk variations for ovarian cancers. This ad hoc analysis of the CHARLOTTE epidemiological study in Japan assessed the distribution of gBRCA1/2 mutations in patients with newly diagnosed ovarian cancer, and investigated an association between gBRCA1/2 mutation locations and ovarian cancer risk. Differences in patient background and clinical characteristics in subgroups stratified by gBRCA1/2 mutation locations were also evaluated. We analyzed the data of 93 patients (14.7%) from the CHARLOTTE study who were positive for gBRCA1/2 mutations. After excluding 16 cases with L63X founder mutation, 28 (65.1%) of gBRCA1 mutations were within the OCCR. Of 30 gBRCA2 mutations, 15 (50.0%) were within the OCCR. Of 27 patients (one patient excluded for unknown family history) with gBRCA1 mutations located in the OCCR, 11 (40.7%) had a family history of ovarian cancer; the proportion of patients with a family history of ovarian cancer and gBRCA1 mutations outside the OCCR was lower (13.3%). Sixty percent of patients with gBRCA1 mutations outside the OCCR had a family history of breast cancer; the proportion of patients with a family history of breast cancer and gBRCA1 mutations within the OCCR was relatively lower (33.3%). Understanding the mutation locations may contribute to more accurate risk assessments of susceptible individuals and early detection of ovarian cancer among gBRCA mutation carriers.  相似文献   
54.
Seiki Kiriyama  Kazuto Kozaka  Tadahiro Takada  Steven M. Strasberg  Henry A. Pitt  Toshifumi Gabata  Jiro Hata  Kui‐Hin Liau  Fumihiko Miura  Akihiko Horiguchi  Keng‐Hao Liu  Cheng‐Hsi Su  Keita Wada  Palepu Jagannath  Takao Itoi  Dirk J. Gouma  Yasuhisa Mori  Shuntaro Mukai  Mariano Eduardo Giménez  Wayne Shih‐Wei Huang  Myung‐Hwan Kim  Kohji Okamoto  Giulio Belli  Christos Dervenis  Angus C. W. Chan  Wan Yee Lau  Itaru Endo  Harumi Gomi  Masahiro Yoshida  Toshihiko Mayumi  Todd H. Baron  Eduardo de Santibañes  Anthony Yuen Bun Teoh  Tsann‐Long Hwang  Chen‐Guo Ker  Miin‐Fu Chen  Ho‐Seong Han  Yoo‐Seok Yoon  In‐Seok Choi  Dong‐Sup Yoon  Ryota Higuchi  Seigo Kitano  Masafumi Inomata  Daniel J. Deziel  Eduard Jonas  Koichi Hirata  Yoshinobu Sumiyama  Kazuo Inui  Masakazu Yamamoto 《Journal of hepato-biliary-pancreatic sciences》2018,25(1):17-30
Although the diagnostic and severity grading criteria on the 2013 Tokyo Guidelines (TG13) are used worldwide as the primary standard for management of acute cholangitis (AC), they need to be validated through implementation and assessment in actual clinical practice. Here, we conduct a systematic review of the literature to validate the TG13 diagnostic and severity grading criteria for AC and propose TG18 criteria. While there is little evidence evaluating the TG13 criteria, they were validated through a large‐scale case series study in Japan and Taiwan. Analyzing big data from this study confirmed that the diagnostic rate of AC based on the TG13 diagnostic criteria was higher than that based on the TG07 criteria, and that 30‐day mortality in patients with a higher severity based on the TG13 severity grading criteria was significantly higher. Furthermore, a comparison of patients treated with early or urgent biliary drainage versus patients not treated this way showed no difference in 30‐day mortality among patients with Grade I or Grade III AC, but significantly lower 30‐day mortality in patients with Grade II AC who were treated with early or urgent biliary drainage. This suggests that the TG13 severity grading criteria can be used to identify Grade II patients whose prognoses may be improved through biliary drainage. The TG13 severity grading criteria may therefore be useful as an indicator for biliary drainage as well as a predictive factor when assessing the patient's prognosis. The TG13 diagnostic and severity grading criteria for AC can provide results quickly, are minimally invasive for the patients, and are inexpensive. We recommend that the TG13 criteria be adopted in the TG18 guidelines and used as standard practice in the clinical setting. Free full articles and mobile app of TG18 are available at: http://www.jshbps.jp/modules/en/index.php?content_id=47 . Related clinical questions and references are also included.  相似文献   
55.
56.
Early eye contact between mother and baby is considered important in the attachment process between mother and baby. How soon after birth is it possible for eye contact to occur? How soon after birth will a baby open his eyes spontaneously? Where is the baby physically at that time? Is hospital labour ward routine conducive to early eye-to-eye contact between mother and baby? Discussing these questions with midwifery colleagues, it became apparent that we were unable to answer with any degree of certainty, the question ‘How soon after birth will a baby open his eyes spontaneously?’ It was felt that ‘most babies open their eyes at or very soon after birth’. How soon was ‘very soon’? and did all babies open their eyes soon after birth? Were there any observable influencing factors? If so, what were they? In this study of 104 babies, 30 babies opened their eyes at birth, and the remainder, except three, opened their eyes ranging from within 1 minute of birth to within 20 minutes of birth (20 minutes being the time limit set for the study). Some babies were observed to open their eyes momentarily only the very first time, keeping their eyes open longer subsequently.  相似文献   
57.
To evaluate laparoscopy-assisted Billroth-I gastrectomy (LADG), we examined the outcome of its use over the last 10 years. From December 1991 to December 2001, 116 patients with early gastric cancer underwent LADG in the surgical department of Oita Medical University and Koga hospital by the same surgical staffs. An operation record and clinical sheets were reviewed to obtain the operative findings, clinical course, and pathologic findings of resected specimens to evaluate the usefulness of LADG in the management of early gastric cancer. In all LADG procedures, regional lymph nodes dissection (D1+alpha) was successfully performed using laparoscopy. The mean operative duration and blood loss were 234 minutes and 139 mL, respectively. There were only four major complications, including pneumonia, leakage of anastomosis, pancreatic injury, and anastomotic stenosis, but all these cases were successfully treated conservatively. The mean length of postoperative stay was 16.3 +/- 2.5 days. All patients except one, who died not of cancer but of cerebral bleeding, were alive without recurrence or port-site metastasis during mean follow-up period of 45 months. We successfully performed 116 LADG procedures over 10 years. This procedure is recommended for the treatment of patients with early gastric cancer because of the associated good prognosis and several benefits, including less invasiveness and early recovery.  相似文献   
58.
目的观察中心静脉导管行胸腔闭式引流术与传统胸腔穿刺抽液对结核性渗出性胸膜炎临床疗效。方法治疗组142例应用中心静脉导管行胸腔闭式引流术;对照组140例应用传统胸腔穿刺抽液法每周2次,观察发热、气促改善、胸水吸收时间、并发症等情况。结果平均退热时间、气促缓解时间治疗组较对照组明显缩短,胸水吸收时间治疗组6.92±4.61天,对照组22.57±15.13天,胸膜增厚程度治疗组10.54±8.59mm,对照组19.36±9.87mm,两组有显著性差异(P<0.01)。对照组并发症发生率14.29%,明显高于治疗组14.1%。结论应用中心静脉导管行胸腔闭式引流术,仅需一次性操作,可较快减轻临床症状,缩短治疗时间,并发症少。  相似文献   
59.
60.
Summary.  Based on the results of large clinical trials, several low-molecular-weight heparins (LMWHs) have been approved for prophylaxis and the treatment of venous and arterial thromboembolism. As a result of expiration or pending expiration of patent protection of the originator LMWHs, many generic or biosimilar LMWHs have been approved in some countries and more are likely to be approved elsewhere. Their greater availability may reduce the treatment costs. The Working Party on Requirements for Development of Biosimilar LMWHs of the Subcommittee on Control of Anticoagulation, Scientific and Standardization Committee of the International Society on Thrombosis and Haemostasis has reached a consensus on recommendations to ensure the quality of biosimilar LMWHs as compared with the originator LMWHs.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号