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   641篇
  免费   37篇
  国内免费   46篇
耳鼻咽喉   2篇
儿科学   48篇
妇产科学   20篇
基础医学   66篇
口腔科学   37篇
临床医学   93篇
内科学   163篇
皮肤病学   10篇
神经病学   20篇
特种医学   116篇
外科学   24篇
综合类   10篇
预防医学   24篇
眼科学   3篇
药学   59篇
  1篇
肿瘤学   28篇
  2023年   5篇
  2022年   5篇
  2021年   6篇
  2019年   4篇
  2018年   10篇
  2017年   9篇
  2016年   11篇
  2015年   15篇
  2014年   19篇
  2013年   25篇
  2012年   9篇
  2011年   14篇
  2010年   19篇
  2009年   22篇
  2008年   8篇
  2007年   41篇
  2006年   18篇
  2005年   10篇
  2004年   3篇
  2003年   5篇
  2002年   11篇
  2001年   5篇
  2000年   7篇
  1999年   11篇
  1998年   44篇
  1997年   53篇
  1996年   55篇
  1995年   44篇
  1994年   30篇
  1993年   30篇
  1992年   2篇
  1991年   11篇
  1990年   7篇
  1989年   14篇
  1988年   25篇
  1987年   19篇
  1986年   15篇
  1985年   14篇
  1984年   6篇
  1983年   8篇
  1982年   9篇
  1981年   8篇
  1980年   11篇
  1978年   4篇
  1977年   8篇
  1976年   3篇
  1975年   4篇
  1971年   2篇
  1967年   1篇
  1960年   1篇
排序方式: 共有724条查询结果,搜索用时 15 毫秒
91.
We report the results of a study in previously untreated advanced stage patients with follicular lymphoma (FL) who underwent uniform induction chemotherapy with cyclophosphamide, doxorubicin, vincristine, prednisone (CHOP) followed by myeloablative therapy and anti-B-cell monoclonal antibody purged autologous bone marrow transplantation (ABMT). Eighty-three patients with previously untreated, low-grade FL were enrolled. After CHOP induction, only 36% achieved complete remission (CR) and 77 patients underwent ABMT. Before BM harvest, 70 patients had a known t(14;18), as determined by polymerase chain reaction (PCR), and all remained PCR positive in the BM at harvest. After ABMT, the disease-free survival (DFS) and overall survival are estimated to be 63% and 89% at 3 years, respectively, with a median follow-up of 45 months. Patients whose BM was PCR negative after purging experienced significantly longer freedom from recurrence (FFR) than those whose BM remained PCR positive (P = .0006). Continued PCR negativity in follow-up BM samples was also strongly predictive of continued CR. This study suggests that a subset of patients with advanced FL may experience prolonged clinical and molecular remissions following high-dose ablative therapy, although longer follow-up will be necessary to determine potential impact on overall survival.  相似文献   
92.
93.
Aim: To investigate the impact of the Pharmacy Outreach Service (POS) on blood pressure (BP) and disease knowledge among community‐dwelling elderly patients with hypertension, and to evaluate the sustainability of such impact of POS. Methods: A prospective open‐labeled study of elderly adults (aged ≥65 years) with hypertension (BP ≥140/90 mmHg for non‐diabetics and ≥130/80 mmHg for diabetics) was carried out at seven elderly community centers from July 2008 to March 2010. Pharmacists provided BP monitoring, medication review and disease knowledge assessment. The target BP was <140/90 mmHg for non‐diabetics and <130/80 mmHg for diabetics. The primary outcome was BP change, whereas the secondary outcome was the change of disease knowledge of hypertension. All outcomes were compared between baseline and the last visit. For POS 2008/09 participants, BP was compared between values obtained during POS 2008/09 and 2009/10. Results: A total of 97 participants were recruited. Systolic BP reduced significantly from 152.38 ± 18.80 mmHg to 147.04 ± 20.72 mmHg (P = 0.021), and diastolic BP reduced from 73.84 ± 11.36 mmHg to 71.03 ± 10.97 mmHg (P = 0.010). Cumulative reductions in mean systolic BP and diastolic BP throughout the 2‐year study period were 21.39 ± 24.72 mmHg and 9.88 ± 13.48 mmHg, respectively (P < 0.001). A 12% increase in the at‐goal rate was observed in new participants recruited in 2009 (P = 0.039). Disease knowledge of hypertension improved significantly (P < 0.005), particularly in areas that included the definition of hypertension, diet and lifestyle modification. Conclusions: The POS might improve blood pressure control, hypertension and diabetes knowledge in elderly adults with hypertension in Hong Kong. The effect on blood pressure improvement was sustainable. Geriatr Gerontol Int 2013; 13: 175–181.  相似文献   
94.
95.
Purpose.?To determine whether foot and leg problems are independently associated with functional status in a community sample of older people after adjusting for the influence of socio-demographic, physical and medical factors.

Method.?Data were analysed from the Health Status of Older People project, a population-based study involving a random sample of 1000 community-dwelling people aged 65?–?94 years (533 females, 467 males, mean age 73.4 years?±?5.87). A structured interview and brief physical examination were used to investigate the associations between self-reported foot and leg problems and functional status. Functional status was assessed using: (i) timed ‘Up & Go’ test, (ii) self-reported difficulty climbing stairs, (iii) self-reported difficulty walking one kilometer, (iv) self-reported difficulty performing instrumental activities of daily living (IADLs), and (v) self-reported history of one or more falls in the previous 12 months. These associations were then explored after adjusting for socio-demographic, physical and medical factors.

Results.?Thirty-six percent of the sample reported having foot or leg problems. Univariate analyses revealed that people with foot and leg problems were significantly more likely to exhibit poorer functional status in all parameters measured. After adjusting for socio-demographic, physical and medical factors, foot and leg problems remained significantly associated with impaired timed ‘Up & Go’ performance (OR?=?2.15, 95%CI 1.55?–?2.97), difficulty climbing stairs (OR?=?3.33, 95%CI 1.98?–?5.61), difficulty walking one kilometer (OR?=?3.13, 95%CI 2.09?–?4.69), and history of falling (OR?=?1.73, 95%CI 1.26?–?2.37).

Conclusions.?Foot and leg problems are reported by one in three community-dwelling people aged 65 years and older. Independent of the influence of age, gender, common medical conditions and other socio-demographic factors, foot and leg problems have a significant impact on the ability to perform functional tasks integral to independent living.  相似文献   
96.
97.
拟胆碱莨菪烷类生物碱的合成及其生物活性   总被引:9,自引:0,他引:9  
  相似文献   
98.
CONTEXT: Pesticide exposure is an important environmental and occupational health risk for agricultural workers and their families, but health care providers receive little training in it. OBJECTIVE: To evaluate the medical resources available to providers caring for patients, particularly farmworkers, exposed to pesticides and to recommend a selective bibliography for use in educating clinicians about pesticides and health care. These resources are divided into 3 domains: (1) the working knowledge, (2) the skill set, and (3) the references needed to care for these patients. METHODS: We searched library databases dating back to 1995, as well as conference materials and Internet resources. Materials were included only if they were readily available through customary sources. Materials were randomly divided into 2 groups. Two authors wrote detailed reviews for each group. The remaining authors read each document and review, making changes that were agreed upon by the team. Review procedures were standardized to examine the contemporary relevance, quality, and overall strengths and weaknesses of the material relative to guidelines developed for each domain. These guidelines were developed from the authors' experience, national focus groups, and literature review. RESULTS: While no 1 resource adequately addresses all needs, a number of resources were identified addressing the categories of working knowledge, skill set, and reference materials. Few of the reviewed materials address the cultural competence of providers treating farmworkers. Additional education resources are needed.  相似文献   
99.
100.
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