全文获取类型
收费全文 | 154452篇 |
免费 | 13684篇 |
国内免费 | 8091篇 |
专业分类
耳鼻咽喉 | 1875篇 |
儿科学 | 2233篇 |
妇产科学 | 1685篇 |
基础医学 | 18636篇 |
口腔科学 | 2916篇 |
临床医学 | 18872篇 |
内科学 | 23048篇 |
皮肤病学 | 2881篇 |
神经病学 | 8051篇 |
特种医学 | 6786篇 |
外国民族医学 | 48篇 |
外科学 | 15495篇 |
综合类 | 22150篇 |
现状与发展 | 37篇 |
一般理论 | 17篇 |
预防医学 | 11376篇 |
眼科学 | 3554篇 |
药学 | 16662篇 |
128篇 | |
中国医学 | 8173篇 |
肿瘤学 | 11604篇 |
出版年
2024年 | 468篇 |
2023年 | 2180篇 |
2022年 | 5483篇 |
2021年 | 7585篇 |
2020年 | 5477篇 |
2019年 | 4865篇 |
2018年 | 5029篇 |
2017年 | 4764篇 |
2016年 | 4782篇 |
2015年 | 7263篇 |
2014年 | 8886篇 |
2013年 | 9216篇 |
2012年 | 13174篇 |
2011年 | 13731篇 |
2010年 | 9322篇 |
2009年 | 7686篇 |
2008年 | 9400篇 |
2007年 | 8937篇 |
2006年 | 8411篇 |
2005年 | 7481篇 |
2004年 | 5472篇 |
2003年 | 4846篇 |
2002年 | 4062篇 |
2001年 | 2980篇 |
2000年 | 2747篇 |
1999年 | 2386篇 |
1998年 | 1226篇 |
1997年 | 1207篇 |
1996年 | 899篇 |
1995年 | 830篇 |
1994年 | 733篇 |
1993年 | 451篇 |
1992年 | 673篇 |
1991年 | 586篇 |
1990年 | 505篇 |
1989年 | 415篇 |
1988年 | 364篇 |
1987年 | 312篇 |
1986年 | 262篇 |
1985年 | 189篇 |
1984年 | 135篇 |
1983年 | 115篇 |
1982年 | 64篇 |
1981年 | 64篇 |
1980年 | 50篇 |
1979年 | 76篇 |
1978年 | 44篇 |
1977年 | 42篇 |
1976年 | 48篇 |
1974年 | 49篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
1999年1月~2006年12月我科应用显微支撑喉镜术、电视喉内窥镜术及间接喉镜术治疗声带良性病变108例,报道如下。 相似文献
62.
Marc D Pacifico Norbert V Kang 《Journal of plastic, reconstructive & aesthetic surgery》2007,60(5):455-464
BACKGROUND: The tuberous breast presents a problem for which many surgical solutions have been described. Current teaching describes how the tuberous breast deformity is the result of skin shortage as well as herniation of breast tissue through the nipple-areola complex. However, through careful clinical observation we now believe that the only abnormality present is herniation of breast tissue through the nipple-areola complex. METHODS: Using this principle, we have refined a one-stage surgical procedure that can be used to correct any type of tuberous breast deformity. Since 2001 we have performed our technique on a series of 13 tuberous breasts of widely varying appearances in eight patients (age 17-24 years) with a follow up varying between 3 and 56 months. Our new understanding of the tuberous breast deformity has also made it possible to develop an objective, reproducible method for defining the tuberous breast based on the degree of areola herniation. RESULTS: All patients reported high levels of satisfaction with the procedure. Assessment of the results by an independent panel of attending surgeons showed all results to be good/excellent. Moreover, the results have improved with time and no revisions have been needed. Our method of defining the tuberous breast (based on the ratio of areola herniation:areola diameter) enabled us to identify a cut-off to decide (objectively) when a breast was tuberous. This allowed us to anticipate when an areola reduction/tightening procedure would be necessary to avoid a 'double-bubble' deformity. CONCLUSION: We propose a one-stage surgical procedure which is applicable to all degrees of tuberous breast deformity. The results appear to confirm our theory that the only abnormality present in the tuberous breast is herniation of breast tissue through the nipple-areola complex. In patients with small breasts and a tuberous deformity, correction of the herniation changes the tuberous breast into a simple hypoplastic breast. The volume deficit can then be corrected by augmentation (if desired by the patient). In patients with sufficient breast volume, correction of the herniation alone will correct the deformity. 相似文献
63.
Treatment of congenital cystic adenomatoid malformation-does resection in the early postnatal period increase surgical risk? 总被引:1,自引:0,他引:1
Young Tae Kim Jun Sung Kim June Dong Park Chang Hyun Kang Sook Whan Sung Joo Hyun Kim 《European journal of cardio-thoracic surgery》2005,27(4):658-661
OBJECTIVE: The recent development of fetal ultrasonography has allowed for an increasing number of prenatal diagnoses for congenital cystic adenomatoid malformation (CCAM). However, the appropriate surgical timing of these patients has not been studied as of yet. The aim of this study is to suggest a safe strategy for the treatment of CCAM by identifying the relationship between the timing of surgery and postoperative outcome. METHODS: Between 1987 and 2003, 40 patients (28 males, 12 females) underwent surgical resection for CCAM. The mean age was 38.6+/-9.1 (2 days-13 years) months. CCAM was diagnosed by prenatal ultrasonography in eight patients. Early operations were performed in four out of the eight. Operation was deferred until 2-12 months of age for the remaining four patients. RESULTS: Type I CCAM was found in 20 patients, type II in 20 and no patient exhibited type III. Five patients had associated pectus excavatum anomaly. There were no cases of operative mortality. Seventeen minor postoperative complications developed in 16 patients (40.0%): prolonged chest tube drain in 10, wound infection in 4, and 1 case of pneumonia, empyema and pleural space, respectively. The average hospital stay was 11.8 (6-29) days. During the mean follow-up period of 67.5 months, one patient died of accidental aspiration 7 months after operation during the postoperative recovery course of Ravich operation for pectus excavatum. The remaining patients reported doing well with normal physical activity. All five patients who underwent surgery at the age of under 1 month did not exhibit increased postoperative morbidity. CONCLUSIONS: We concluded that surgery for CCAM could be safely performed in all age groups with satisfactory long-term outcomes. It is suggested that early elective surgical correction can be recommended for a patient whose diagnosis was made in utero. 相似文献
64.
65.
OBJECTIVE: To evaluate the possibility and reliability of the hyoid-sternohyoid graft transfer in the correction of server subglottic laryngotracheal stenosis, and delineate the operation skills and clinical results. METHODS: Seven patients with severe subglottic stenosis underwent laryngotracheal reconstruction using the hyoid grafts with sternohyoid muscle flaps (HG-SHMF). Five of these patients had traumatic subglottic stenosis, one with scar tissue of unknown etiology arising in the subglottic region, another with tracheal narrowing caused by inhalation of hydrochloric acid. RESULTS: All seven patients were successfully decannulated with moderate good voice. The average time from reconstruction to decannulation was 15.4 months. The stent was endoscopically removed with a range of 3 to 22 months; the mean time required for stenting was 9.6 months. Two patients who received additional salvage reconstruction procedures because of graft or stent displacement were extubated with improved voices and satisfactory airway. CONCLUSIONS: The HG-SHMF transfer was a single-stage reconstruction, relatively simple procedure that can restore an adequate airway and a good voice. Patients undergoing laryngotracheal reconstruction with HG-SHMF must have regular, long-term follow-up since graft displacement and recurrent granulation tissue or scar reformation can cause restenosis after an initially successful surgery. This procedure should be used in a large number of patients to further test its reliability. 相似文献
66.
67.
68.
YOU Han XIAO Bing CUI Da-Xiang SHI Yong-Quan FAN Dai-Ming 《World journal of gastroenterology : WJG》1998,4(4)
AIM To clone novel gastric cancer-associated genes and investigate their roles in gastric cancer occurrence.METHODS A method called differential display was used which allows the identification of differentially expressed genes by using PAGE to display PCR-amplified cDNA fragments between gastric cancer cells and normal gastric mucosa cells. These fragments were cloned into plasmid vector pUC18. Homology analysis was made after sequencing these fragments.RESULTS Two novel genes were identified compared with sequences from GenBank. One was registered with the AD number AF 051783. In situ hybridization showed that these two novel genes expressed specifically in gastric cancer tissues.CONCLUSION The two novel genes obtained by differential display were confirmed to be gastric cancer-associated genes using in situ hybridization. 相似文献
69.
对耳轮过度前突为对耳轮的角度过锐,致使耳轮的位置相应后移,表现为与招风耳完全相反的畸形。畸形虽不十分明显,但影响美观。自1992年4月开始应用患侧耳廓软骨和耳后皮瓣对5例患者8只外耳进行治疗得到满意效果。认为文中所述方法是矫正对耳轮过度前突畸形的良好方法。 相似文献
70.
W K Moon M H Han I O Kim M W Sung K H Chang S W Choo M C Han 《AJNR. American journal of neuroradiology》1995,16(4):997
We report a case of congenital fistula from ectopic accessory parotid gland to the cheek demonstrated by CT sialography and CT fistulography. The right parotid gland was abnormally located lateral to masseter muscle. The fistula was arising from an ectopic accessory parotid gland with ectopic duct positioned anterior to masseter muscle. CT sialography and CT fistulography were very helpful in the diagnosis and surgical planning. 相似文献