全文获取类型
收费全文 | 24017篇 |
免费 | 1463篇 |
国内免费 | 246篇 |
专业分类
耳鼻咽喉 | 407篇 |
儿科学 | 380篇 |
妇产科学 | 316篇 |
基础医学 | 3994篇 |
口腔科学 | 419篇 |
临床医学 | 1986篇 |
内科学 | 4835篇 |
皮肤病学 | 855篇 |
神经病学 | 1984篇 |
特种医学 | 1396篇 |
外科学 | 3183篇 |
综合类 | 114篇 |
一般理论 | 4篇 |
预防医学 | 928篇 |
眼科学 | 497篇 |
药学 | 2144篇 |
中国医学 | 299篇 |
肿瘤学 | 1985篇 |
出版年
2023年 | 203篇 |
2022年 | 508篇 |
2021年 | 831篇 |
2020年 | 428篇 |
2019年 | 602篇 |
2018年 | 695篇 |
2017年 | 535篇 |
2016年 | 806篇 |
2015年 | 1030篇 |
2014年 | 1177篇 |
2013年 | 1435篇 |
2012年 | 2040篇 |
2011年 | 1956篇 |
2010年 | 1165篇 |
2009年 | 966篇 |
2008年 | 1428篇 |
2007年 | 1329篇 |
2006年 | 1237篇 |
2005年 | 1125篇 |
2004年 | 965篇 |
2003年 | 837篇 |
2002年 | 744篇 |
2001年 | 446篇 |
2000年 | 413篇 |
1999年 | 356篇 |
1998年 | 239篇 |
1997年 | 192篇 |
1996年 | 187篇 |
1995年 | 146篇 |
1994年 | 139篇 |
1993年 | 116篇 |
1992年 | 114篇 |
1991年 | 114篇 |
1990年 | 99篇 |
1989年 | 114篇 |
1988年 | 116篇 |
1987年 | 98篇 |
1986年 | 77篇 |
1985年 | 78篇 |
1984年 | 59篇 |
1983年 | 53篇 |
1982年 | 47篇 |
1981年 | 37篇 |
1980年 | 37篇 |
1979年 | 55篇 |
1978年 | 33篇 |
1977年 | 31篇 |
1976年 | 32篇 |
1975年 | 26篇 |
1973年 | 27篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Tuberculin-sensitized guinea pigs were intravenously injected with heat-killed Propionibacterium acnes followed by an intravenous injection of purified protein derivatives 7 day later, resulting in the induction of intrahepatic cholestasis. Using this experimental model, the following results were obtained: (1) Both uptake and release of bile acid were inhibited in the hepatocytes prepared from the cholestasis guinea pigs. (2) The results of the erythritol clearance method indicated that the decrease in bile flow observed in the cholestasis guinea pigs was mostly attributable to the reduced bile excretion from the canaliculi. (3) The decrease in the formation of bile acid independent bile flow was the cause of the decrease in bile flow observed in the cholestasis guinea pigs. (4) There was no change in the permeability of the interhepatocellular tight junction in the cholestasis guinea pigs. 相似文献
52.
53.
Gi-Young Park Jong-Min Kim Sung-Il Sohn Im-Hee Shin Michael Y Lee 《Journal of rehabilitation medicine》2007,39(7):526-530
OBJECTIVE: To evaluate the ultrasonographic measurement of shoulder subluxation in patients with post-stroke hemiplegia. DESIGN: Prospective, single blind study. PATIENTS: A total of 41 patients with post-stroke hemiplegia were included (24 men and 17 women, mean age 56 years (standard deviation 11), age range 34-78 years). METHODS: Clinical evaluation of the affected shoulder was assessed using the Motricity Index scores and the Modified Ashworth Scale. Two ultrasonographic measurements were taken to check intra-rater reliability. The shoulder subluxation ratio was determined as the ratio of the radiographic vertical and horizontal distance, and the ultrasonographic lateral and anterior distances in the affected shoulder divided by that in the unaffected shoulder. RESULTS: Intraclass correlation coefficients of the repeated ultrasonographic lateral/anterior distance measurements in the unaffected and affected shoulders were 0.979/0.969 and 0.950/0.947, respectively. Ultrasonographic lateral/anterior distance ratios were negatively correlated with Motricity Index scores of the affected shoulder abduction (r = -0.490, p < 0.001/ r = -0.671, p < 0.001). Ultrasonographic anterior distance ratio was negatively correlated with Modified Ashworth Scale score of the affected shoulder (r = -0.374, p < 0.05). However, there was no correlation between radiographic distance ratios and clinical evaluation scores. CONCLUSION: We strongly recommend ultrasonography as a diagnostic tool to measure the degree of shoulder subluxation in patients with post-stroke hemiplegia. 相似文献
54.
Ryuji Takaki Tsutomu Nishiyama Masao Sekiya Shin Ishizawa Akira Junicho Yoshiyuki Fujishiro Yutaka Yabuzaki 《International journal of urology》1997,4(1):97-98
A 60-year-old Japanese man was hospitalized because of urinary leakage from the anus on October 3, 1994. Retrograde urethrography detected a fistula between the bulbous urethra and the rectum. Urethrocystoscopy revealed a tumor on the urethrorectal fistula. Tumor biopsy showed a well differentiated adenocarcinoma. Cystourethrectomy with fistulectomy, and ileal conduit urinary diversion were performed. Pathological examination revealed primary adenocarcinoma in the fistula with invasion to the prostatic urethra and bladder wall. The patient showed no evidence of a recurrence as of August, 1996. 相似文献
55.
Rupture of an intra-aortic balloon counterpulsator (IABCP) demands immediate removal. We report a case of thrombus formation within a Datascope IABCP secondary to IABCP rupture, necessitating surgical exploration for removal. There is a disturbing pattern of balloon ruptures with this type of IABCP. 相似文献
56.
Kyung Cheon Kim Kwang Jin Rhee Hyun Dae Shin Young Mo Kim 《Knee surgery, sports traumatology, arthroscopy》2007,15(12):1478-1481
Calcific tendinitis is a common condition with characteristic clinical and radiological findings. Although we do not know
which condition initiated the pathologic cascade, we present a rare case of calcific tendinitis of the long head of the biceps
brachii at its origin, associated with a SLAP lesion. The calcium deposit was removed and the SLAP lesion was repaired with
a suture anchor arthroscopically. 相似文献
57.
Shimeru Kamihira Shigehiro Nakashima Shin Saitoh Michiko Kawamoto Yumiko Kawashima Mitoshi Shimamoto 《Cancer science》1993,84(8):834-837
A fully automated chemiluminescence immunoassay was developed for the detection of antibodies to HTLV-I. We used partially purified viral antigens coated on small polystyrene beads together with acridinium ester-labeled anti-human immunoglobulin G mouse immunoglobulin G in this method. A good agreement was observed between our proposed method, the indirect immunofluorescence assay, the particle-agglutination test and the enzyme immunoassay. This new method, which is simple, sensitive, specific and rapid, should be useful for mass screening of anti-HTLV-I antibodies. 相似文献
58.
Jeong-Hoon Oh Keehyun Park Seung Joo Lee You Ree Shin Yun-Hoon Choung 《Otolaryngology--head and neck surgery》2007,136(1):87-91
OBJECTIVES: To analyze the clinical characteristics and treatment results between bilateral (bi-) and unilateral (uni-) sudden sensorineural hearing loss (SSNHL). STUDY DESIGN AND SETTING: A retrospective study. METHODS: Three hundred twenty-four patients with SSNHL were classified into two groups; simultaneous bi-SSNHL (n = 16) and uni-SSNHL (n = 308). We compared clinical characteristics, medical history, hearing level, and treatment results between the 2 groups. RESULTS: The incidence of bi-SSNHL was 4.9 percent of overall patients with SSNHL. Bi-SSNHL occurs more commonly in patients of older age, with preexisting diabetes mellitus, and lipid panel abnormalities compared with uni-SSNHL. Ten patients (62.5%) in the bi-SSNHL group showed hearing recovery in 1 or both ears compared with 56.5 percent of patients with uni-SSNHL. Only 12 (37.5%) of all 32 ears recovered in bi-SSNHL, which was significantly lower than in uni-SSNHL. CONCLUSION: Bi-SSNHL has a very low incidence and lower recovery rate than uni-SSNHL. Recognition of similarities and differences between bilateral and unilateral SSNHL can help in counseling and managing the patients. 相似文献
59.
60.
Satoshi Kawaguchi Shin Ishimaru Nobusato Koizumi Taro Shimazaki Yukio Obitsu Mikio Ishikawa 《General thoracic and cardiovascular surgery》1998,46(10):1047-1051
Multiple aortic aneurysms in Behçet’s disease were repaired with transluminaly placed endovascular stent grafts. Before deploying the stent graft device for permanent implantation for the saccular aneurysm located in the descending thoracic arota, from which feeding arteries for the spinal cord possibly branched, a retrievable stent graft was inserted and evoked spinal cord potential (ESP) were monitored in order to predict spinal cord ischemia. The original retrievable stent graft, constructed of a self-expandable Z-shaped stainless steel stent covered with e-PTFE, can be easily withdrawn into a 18 Fr. sheath after deployment. Blood flow into intercostal arteries branching from that part of the descending aorta where the permanent stent graft is planned to be implanted, is intercepted by the retrievable stent graft. A change of ESP during the temporary implantation of the device indicates that spinal cord ischemia would be caused by permanent implantation of the stent graft. In this case, no change of ESP was observed and the patient showed no postoperative paraplegia.The retrievable stent graft was useful for prediction of spinal cord ischemia before endoluminal stent graft repair of the descending aortic aneurysm. However, the device is not flexible enough to fit a severely tortuous aorta, therefore we are obliged to select patients to some extent. Further improvement of the device is required to make prediction of spinal cord ischemia with the retrievable stent graft possible in all cases. 相似文献